Перегляд за автором "Kravchenko, A.I."

Сортувати за: Порядок: Результатів:

  • Aquation of impurity distribution in a solid distillate 
    Kravchenko, A.I. (Functional Materials, 2006)
    An equation has been derived describing the distribution of an impurity in a distillate obtained by vapor condensation into solid phase at a low impurity content and under ideal mixing of the substance being distilled.
  • A system for polymer film irradiation with heavy ions accelerated to the energy of 1 MeV/u 
    Bomko, V.A.; Bryk, M.T.; Dyachenko, A.F.; Zabotin, A.V.; Zajtsev, B.V.; Zhuk, V.V.; Zhuravlev, V.G.; Kobets, A.F.; Kravchenko, A.I.; Lesnykh, M.S.; Reshetnikov, V.N. (Вопросы атомной науки и техники, 2006)
    At the Kharkov heavy ion linear accelerator MILAC experimental investigations on irradiation polymer films with heavy ion beams are carried out with the aim of obtaining track-etched membranes. Presently, the MILAC ...
  • Comparison of refining by distillation and crystallization 
    Kravchenko, A.I. (Functional Materials, 2009)
    The equations for comparison of refining efficiency by distillation and Czochralski crystallization have been derived. It has been shown that for some systems being purified (for example, at purification of cadmium from ...
  • Experimental research and work development on the helium ions linac 
    Onishchenko, I.M.; Manuilenko, O.V.; Zajtsev, B.V.; Dubniuk, S.M.; Коbets, А.P.; Kravchenko, A.I.; Pavlii, К.V.; Reshetnikov, V.M.; Soshenkо, V.A.; Tishkin, S.S.; Zhuravlyov, O.V.; Zhuravlyov, V.G. (Вопросы атомной науки и техники, 2021)
    The paper provides a brief summary of the experimental research carried out at the present time at the materials science complex developed at the NSC KIPT. The main directions for the development of the work carried out ...
  • High-voltage modulator of the Linac injector with voltage pulse stabilization 
    Anokhin, R.A.; Dubniuk, S.N.; Gaponenko, N.I.; Kobets, A.P.; Kravchenko, A.I.; Manuilenko, O.V.; Reshetnikov, V.N.; Shevchenko, A.S.; Soshenko, V.A.; Svichenskiy, V.G.; Zajtsev, B.V.; Zabotin, A.V.; Zhuravlyov, V.G.; Zhuravlyov, A.V. (Вопросы атомной науки и техники, 2019)
    The high-voltage pulse modulator based on the modern semiconductor elements is described. The modulator is intended for use in the power supply system of LINAC helium ions injector and has the ability to smoothly adjust ...
  • Impurities distribution at phase transformations from ideal mixing phase 
    Kravchenko, A.I. (Functional Materials, 2011)
  • On combination of floating-zone recrystallization with other purification method 
    Kravchenko, A.I. (Functional Materials, 2007)
    Information of combination of floating-zone recrystallization with other purification method (Czochralski, Verneil, distillation) is summarized.
  • On multiple distillation or crystallization refining at given yield 
    Kravchenko, A.I.; Datsenko, O.A. (Вопросы атомной науки и техники, 2022)
    A comparison is made of the Cₙ concentration of the impurity with a separation coefficient β < 1 in the product of n-fold refining by simple distillation or normal directed crystallization with the concentration of C₁ ...
  • Power supply system for the helium ions linac’s injector 
    Anokhin, R.A.; Dubnyuk, S.N.; Gaponenko, N.І.; Zhuravlyov, V.G.; Zhuravlyov, A.V.; Zabotin, A.V.; Zajtsev, B.V.; Kravchenko, A.I.; Kobets, A.F.; Manuilenko, O.V.; Reshetnikov, V.N.; Svichenskiy, V.G.; Soshenko, V.A.; Shevchеnko, А.С. (Вопросы атомной науки и техники, 2020)
    This paper presents compact power supply system for the helium ion linac’s injector. The system consists of high-voltage modulator, power supplies of cathode filament, solenoid and arc modulator. It is designed on modern ...
  • Radiation complex on the basis of helium ions linac 
    Dubniuk, S.N.; Anokhin, R.A.; Dyachenko, A.F.; Коbets, А.P.; Kravchenko, A.I.; Manuilenko, O.V; Pavlii, К.V.; Reshetnikov, V.N.; Shevchenko, A.S.; Soshenkо, V.A.; Tishkin, S.S.; Zajtsev, B.V.; Zhuravlyov, A.V.; Zhuravlyov, V.G. (Вопросы атомной науки и техники, 2018)
    The numerical simulation results and experimental investigation of helium ions linear accelerator with output energy 4 MeV and focusing by an RF field are presented. The variant of alternating-phase focusing with a ...
  • Temperature dependences of the Peclet number in sublimation processes of simple substances 
    Kravchenko, A.I.; Zhukov, A.I.; Datsenko, O.A. (Вопросы атомной науки и техники, 2022)
    The results of calculating the Peclet number Ре = wr/(ρD) (where D is the diffusion coefficient; w is the evaporation rate of the substance; ρ is the density of the substance; r is the size factor) in sublimation processes ...
  • Zone distillation: justification 
    Kravchenko, A.I. (Вопросы атомной науки и техники, 2014)
    The features of zone distillation (with zone melting of refined material and with pulling of condensate) as a new purification method are shown. The method is based on similarity of equations of distillation and crystallization ...
  • Тhe bunch formation and transport system to the target of the helium ions linac 
    Dyachenko, A.F.; Anokhin, R.A.; Dubniuk, S.N.; Коbets, А.P.; Kravchenko, A.I.; Manuilenko, O.V; Reshetnikov, V.M.; Soshenkо, V.A.; Tishkin, S.S.; Zajtsev, B.V.; Zhuravlоv, O.V.; Zhuravlоv, V.G. (Вопросы атомной науки и техники, 2018)
    Ways of the bunch current and density increase at the target on the helium ions linear accelerator NSC “KhIPT” with output energy 4 MeV are considered. Possibility of its transportation with the minimum losses to target ...